Question

tìm x biết

1) \(\dfrac{2}{3}+\dfrac{1}{3}:x=\dfrac{3}{5}\)

2) \(\left(\dfrac{2x}{3}-3\right):\left(-10\right)=\dfrac{2}{5}\)

3) \(2\dfrac{2}{3}:x=2\dfrac{1}{12}:\left(-0,06\right)\)

4) \(\dfrac{3}{7}+\dfrac{1}{7}:x=\dfrac{3}{14}\)

5) \(-\dfrac{3}{5}.x-\dfrac{1}{2}=-\dfrac{1}{7}\)

6) \(\dfrac{1}{5}+2x=-2\dfrac{1}{4}\)

7)\(-\dfrac{1}{2}:x=\dfrac{3}{8}:\dfrac{9}{16}\)

8)\(\dfrac{2}{3}:x=2\dfrac{1}{2}:\left(-0,3\right)\)

9) \(\dfrac{x}{3}=\dfrac{-2}{1,5}\)

Answer 1

1: =>1/3:x=3/5-2/3=9/15-10/15=-1/15

=>x=-1/3:1/15=5

2: \(\Leftrightarrow x\cdot\dfrac{2}{3}-3=\dfrac{2}{5}\cdot\left(-10\right)=-4\)

=>x*2/3=-1

=>x=-3/2

3: \(\Leftrightarrow\dfrac{8}{3}:x=\dfrac{25}{12}:\dfrac{-3}{50}=\dfrac{25}{12}\cdot\dfrac{-50}{3}\)

hay x=-48/625

9: =>x=-2*3/1,5=-4

8: =>2/3:x=5/2:-3/10=5/2*(-10)/3=-50/6=-25/3

=>x=-2/3:25/3=-2/3*3/25=-2/25